CA2135635A1 - Apparatus for Preheating and Charging Scrap Materials - Google Patents

Apparatus for Preheating and Charging Scrap Materials

Info

Publication number
CA2135635A1
CA2135635A1 CA2135635A CA2135635A CA2135635A1 CA 2135635 A1 CA2135635 A1 CA 2135635A1 CA 2135635 A CA2135635 A CA 2135635A CA 2135635 A CA2135635 A CA 2135635A CA 2135635 A1 CA2135635 A1 CA 2135635A1
Authority
CA
Canada
Prior art keywords
section
heat exchanger
preheating
furnace shell
throat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2135635A
Other languages
French (fr)
Other versions
CA2135635C (en
Inventor
Motoharu Mori
Hironobu Yoshida
Ikuo Yamamura
Toru Iura
Osamu Takeuchi
Masaki Ogushi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Corp
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27274821&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2135635(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of CA2135635A1 publication Critical patent/CA2135635A1/en
Application granted granted Critical
Publication of CA2135635C publication Critical patent/CA2135635C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/18—Arrangements of devices for charging
    • F27B3/183—Charging of arc furnaces vertically through the roof, e.g. in three points
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/56—Manufacture of steel by other methods
    • C21C5/562—Manufacture of steel by other methods starting from scrap
    • C21C5/565—Preheating of scrap
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/005—Preliminary treatment of scrap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
    • F27D13/002—Preheating scrap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/0035—Devices for monitoring the weight of quantities added to the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0001—Positioning the charge
    • F27D2003/0003—Positioning the charge involving a system for aligning the articles through a lateral guidance, e.g. funnel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/0042—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising roller trains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/0083—Means for stirring the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0006—Electric heating elements or system
    • F27D2099/0021—Arc heating
    • F27D2099/0023—DC arc heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0025—Charging or loading melting furnaces with material in the solid state
    • F27D3/0032—Charging or loading melting furnaces with material in the solid state using an air-lock
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/04—Ram or pusher apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Furnace Details (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

ABSTRACT

An apparatus for preheating and charging scrap material comprises a throat section (38) having at one end thereof a material charging inlet (37) connected to a furnace shell (2), the throat section extending laterally and upwardly obliquely, a heat exchanger section (39) connected to the other end of the throat section (38) and extending upwardly, a sealing section (42) above the heat exchanger section (39), material supply means (43) for supplying the scrap material into the sealing section (42), an exhaust duct (53) formed at the heat exchanger section (39) just below the sealing section (42) and connected to an exhaust system (58) and a material delivery device (46) disposed at the other end of the throat section (38) for delivering the scrap material (13) from the heat exchanger section (39) to the material charging inlet (37). The scrap material (13) is substantially continuously charged into the furnace shell (2) while preheated by the high-temperature exhaust gases from the furnace shell (2).
CA 2135635 1993-04-15 1994-04-14 Apparatus for preheating and charging scrap materials Expired - Fee Related CA2135635C (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP8880493 1993-04-15
JP5-88804 1993-04-15
JP24277193 1993-09-29
JP5-242771 1993-09-29
JP122494A JPH07190629A (en) 1993-04-15 1994-01-11 Scrap material preheating and charging device
JP6-1224 1994-01-11

Publications (2)

Publication Number Publication Date
CA2135635A1 true CA2135635A1 (en) 1994-10-27
CA2135635C CA2135635C (en) 1998-12-22

Family

ID=27274821

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2135635 Expired - Fee Related CA2135635C (en) 1993-04-15 1994-04-14 Apparatus for preheating and charging scrap materials

Country Status (11)

Country Link
US (1) US5513206A (en)
EP (1) EP0646758B1 (en)
JP (1) JPH07190629A (en)
KR (1) KR0168892B1 (en)
CN (1) CN1091871C (en)
AU (1) AU664950B2 (en)
CA (1) CA2135635C (en)
DE (1) DE69413169T2 (en)
ES (1) ES2120618T3 (en)
TW (1) TW306504U (en)
WO (1) WO1994024506A1 (en)

Families Citing this family (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT403846B (en) * 1994-06-28 1998-05-25 Voest Alpine Ind Anlagen SCRAP MELTING ELECTRIC ARC FURNACE
KR100223515B1 (en) * 1995-03-31 1999-10-15 아사무라 타카싯 Method and apparatus for preheating and melting scrap
AT404841B (en) * 1995-04-10 1999-03-25 Voest Alpine Ind Anlagen SYSTEM AND METHOD FOR PRODUCING MELTING IRON
GB2303690B (en) * 1995-07-21 1999-05-26 Queenborough Rolling Mill Comp An oxy:fuel melting furnace
DE19539871A1 (en) * 1995-10-26 1997-04-30 Bsbg Bremer Sonderabfall Berat Smelting furnace, particularly of light-arc type
JP3092083B2 (en) * 1996-02-13 2000-09-25 新日本製鐵株式会社 Preheating apparatus and preheating method for iron scrap
CH690378A5 (en) * 1996-03-04 2000-08-15 Fischer Georg Disa Eng Ag A process for melting metallic charge materials in a shaft furnace.
LU88807A1 (en) * 1996-08-20 1998-02-24 Wurth Paul Sa Charge preheater
US6024912A (en) * 1997-11-27 2000-02-15 Empco (Canada) Ltd. Apparatus and process system for preheating of steel scrap for melting metallurgical furnaces with concurrent flow of scrap and heating gases
CA2222401C (en) * 1997-11-27 2002-09-17 Robert Roy Wunsche Apparatus and process system for preheating of steel scrap for melting metallurgical furnaces with concurrent flow of scrap and heating gases
US6004504A (en) * 1998-03-12 1999-12-21 Techint Compagnia Tecnica Internazionale Method and apparatus for controlling bath level and measurement of bath characteristics
DE19902438A1 (en) * 1999-01-22 2000-07-27 Sms Demag Ag Scrap preheating equipment, especially for the cold iron or steel scrap charge of an electric arc furnace, comprises a charging chamber positioned above a preheating chamber and has inlet and outlet openings operated as locks
DE19926059A1 (en) * 1999-06-08 2000-12-14 Sms Demag Ag Preheater
DE10247939A1 (en) * 2002-10-15 2004-05-13 Arvinmeritor A&Et Gmbh Process for heat treating metallic workpieces and materials comprises transporting the products to be treated through an annealing furnace, introducing hydrogen as protective and reaction gas, and feeding nitrogen openings as inert gas
DE10335847A1 (en) * 2003-07-31 2005-02-17 Sms Demag Ag Electric arc reduction furnace for reducing slag in the recovery of metallic components comprises a charging opening for charging material which simultaneously acts as an exhaust gas line opening for the gas produced
DE10355549A1 (en) * 2003-11-27 2005-06-23 Intracon Gmbh charging material
AP2010005222A0 (en) 2007-09-14 2010-04-30 Barrick Gold Corp Process for recovering platinum group metals usingreductants
US7704443B2 (en) * 2007-12-04 2010-04-27 Alcoa, Inc. Carbothermic aluminum production apparatus, systems and methods
KR100907956B1 (en) * 2008-04-30 2009-07-16 윤수현 Apparatus for pre-heating material
DE102009016774A1 (en) 2009-04-07 2010-10-14 Fuchs Technology Holding Ag charging device
US20100266974A1 (en) * 2009-04-16 2010-10-21 Flsmidth Inc. Apparatus for preheating particulate material
DE102010045825A1 (en) * 2010-09-20 2012-03-22 Intracon Gmbh Charging shaft system and filling method
DE102010047516A1 (en) 2010-10-05 2012-04-05 Fuchs Technology Holding Ag charging device
DE102010049238A1 (en) * 2010-10-25 2012-04-26 Intracon Gmbh Scrap pusher
DE102011109860A1 (en) * 2011-08-09 2013-02-14 Fuchs Technology Holding Ag Charging device with replaceable bottom section
CN102393137B (en) * 2011-11-03 2013-07-03 云南新立有色金属有限公司 Method and device for continuously smelting titanium slag and accurately feeding titanium slag by using direct-current closed electric arc furnace
ITUD20120039A1 (en) * 2012-03-09 2013-09-10 Danieli Off Mecc APPARATUS AND METHOD FOR THE FEEDING AND PREHEATING OF A METALLIC CHARGE TO A FUSION FURNACE
EP2682700A1 (en) * 2012-07-03 2014-01-08 Steb S.r.l. Steel production plant
DE102012014142B3 (en) * 2012-07-18 2013-12-12 Inteco Special Melting Technologies Gmbh Scrap preheating and feeding system
TW201408398A (en) 2012-08-23 2014-03-01 jia-long You Method and device for supplying aluminum alloy melt
KR101461737B1 (en) * 2012-12-21 2014-11-17 주식회사 포스코 Electric Furnace
US20160003542A1 (en) * 2013-02-22 2016-01-07 Cisdi Engineering Co., Ltd. Automatic feeding apparatus for electric arc furnace
ITUD20130052A1 (en) * 2013-04-23 2014-10-24 Danieli Off Mecc PROCEDURE FOR THE FUSION OF METAL MATERIAL IN A MERGER PLANT AND ITS RELATION MERGER PLANT
CN103335525B (en) * 2013-07-02 2014-10-01 宁夏太阳镁业有限公司 Pallet loading machine
ES2457140B1 (en) * 2013-12-11 2014-10-28 La Farga Lacambra, S.A.U. System and procedure for loading melting furnaces and refining copper scrap and associated furnace
CN103954133B (en) * 2014-02-11 2016-05-25 河南太行全利重工股份有限公司 A kind of middle frequency furnace reinforced device of fluxing continuously
EP3106812B1 (en) * 2014-02-14 2018-08-08 JP Steel Plantech Co. Raw material conveyancing bucket, pre-heating device, melting equipment, and operation method for melting equipment
DE102014115671A1 (en) * 2014-10-28 2016-05-12 Gerhard Fuchs MELTING DEVICE AND MELTING METHOD
CN104457298B (en) * 2014-12-04 2016-11-02 江苏盛凯环保工程有限公司 Reciprocating continuous feeding device for scrap steel preheating kiln
KR101712160B1 (en) * 2016-02-18 2017-03-09 주식회사 에스에이씨 Electric furnaces and method for preheating scrap in electric furnaces
US10101090B2 (en) * 2016-07-18 2018-10-16 Owens-Brockway Glass Container Inc. Duct cleaning and valve device for furnace system
CN109682211B (en) * 2017-03-02 2020-04-10 叶柳竹 Chemical smelting device capable of quantitatively conveying chemical agents
CN106979693B (en) * 2017-03-07 2018-11-20 宁波钢铁有限公司 Automatic discharge sealing device for LPD type preheater feed back elephant trunk
CN107462070B (en) * 2017-08-07 2018-12-28 程立章 A kind of smelting furnace for copper product production
DE102017124108A1 (en) * 2017-10-17 2019-04-18 Inteco Melting And Casting Technologies Gmbh Scrap preheating device for a melting furnace and method for scrap preheating
IT202000005281A1 (en) * 2020-03-11 2021-09-11 Qd S R L FEEDING EQUIPMENT TO FEED BALES OF ZINC SCRAP TO A MELTING TANK
CN114645136A (en) * 2022-03-16 2022-06-21 杭州富通集团有限公司 Processing technology of copper rod
DE102022120981A1 (en) * 2022-08-19 2024-02-22 Thyssenkrupp Steel Europe Ag Process for producing molten iron and liquid slag in an electric melter

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE509817A (en) *
DE573416C (en) * 1931-04-02 1933-03-31 Fried Krupp Grusonwerk Akt Ges Device for carrying out a heat exchange between gases and solid to liquid material
DE567060C (en) * 1931-08-30 1932-12-27 Fried Krupp Grusonwerk Akt Ges Device for the pre-treatment of cement raw material by means of the exhaust gases from a kiln
DE646391C (en) * 1933-11-09 1937-06-12 Fried Krupp Grusonwerk Akt Ges Device for the heat treatment of all kinds of goods, for example raw cement
US3163520A (en) * 1960-12-27 1964-12-29 Elektrokemisk As Process and apparatus for preheating and pre-reduction of charge to electric furnace
FR1366791A (en) * 1963-04-19 1964-07-17 Prep Ind Combustibles exchanger for the treatment of solid products by means of gas
US3441651A (en) * 1966-02-23 1969-04-29 Canadian Patents Dev Method and apparatus for heat recovery in electric arc furnaces
JPS5647505Y2 (en) * 1977-05-07 1981-11-06
DE2748670C2 (en) * 1977-10-29 1986-07-31 BKMI Industrieanlagen GmbH, 8000 München Method and device for burning materials of very different grain sizes, in particular limestone gravel
US4445849A (en) * 1981-05-25 1984-05-01 Swiss Aluminium Ltd. Device for thermal treatment of scrap
JPS5875685A (en) * 1981-10-29 1983-05-07 関西研熱工業株式会社 Furnace with raw material preheating facility
US4385918A (en) * 1982-01-26 1983-05-31 Owens-Corning Fiberglas Corporation Method and apparatus for feeding raw material to an arc furnace
US4676742A (en) * 1985-02-25 1987-06-30 Indalloy Division Of Indal Limited Preheater for reverberatory melting furnaces
FR2611876B1 (en) * 1987-03-04 1989-08-04 Clecim Sa DIRECT CURRENT ELECTRIC OVEN
JPH0224290A (en) * 1988-07-13 1990-01-26 Nkk Corp Low resistance hydrofoil
CA2028108C (en) * 1989-03-02 1994-12-06 Joachim Ehle Melting aggregate with shaft for preheating charged materials
FI85912C (en) * 1990-04-11 1992-06-10 Partek Ab FOERFARANDE OCH ANORDNING FOER STYRNING AV RAOMATERIALTILLFOERSELN TILL EN ELEKTRISK SMAELTUGN.
US5400358A (en) * 1992-10-13 1995-03-21 Consteel, S.A. Continuous scrap preheating

Also Published As

Publication number Publication date
EP0646758B1 (en) 1998-09-09
WO1994024506A1 (en) 1994-10-27
EP0646758A1 (en) 1995-04-05
DE69413169D1 (en) 1998-10-15
TW306504U (en) 1997-05-21
CN1104838A (en) 1995-07-05
KR950701727A (en) 1995-04-28
JPH07190629A (en) 1995-07-28
DE69413169T2 (en) 1999-05-06
US5513206A (en) 1996-04-30
ES2120618T3 (en) 1998-11-01
EP0646758A4 (en) 1995-10-11
CA2135635C (en) 1998-12-22
CN1091871C (en) 2002-10-02
KR0168892B1 (en) 1999-01-15
AU664950B2 (en) 1995-12-07
AU6512894A (en) 1994-11-08

Similar Documents

Publication Publication Date Title
CA2135635A1 (en) Apparatus for Preheating and Charging Scrap Materials
US4223873A (en) Direct flame ladle heating method and apparatus
EP0790461A3 (en) Combustion burner and combustion method thereof in furnace
GB2012042A (en) Air supply to heating apparatus
AU1122988A (en) Process of conditioning dust-containing exhaust gases
MY111009A (en) Apparatus for preheating and charging scrap material
JPS5741521A (en) Combustion method and combustion apparatus
JPS5596357A (en) Device for starting engine in cold district
US3895936A (en) Process for reducing iron oxides in rotary kiln
GB1368152A (en) Central shaft feeding for rotary hearth furnace
US4330325A (en) Direct reduction rotary kiln with improved air injection
JP2528696B2 (en) Desulfurization method and apparatus for cyclone coal combustion furnace
PL344624A1 (en) Burner being feed with an air-fuel mixture
JPS5669319A (en) Melting promotion method and apparatus in arc type electric furnace for steel making
JPH08219644A (en) Vertical scrap-melting-furnace and operating method therefor
AU3522389A (en) Device for injecting preheated air into a shaft furnace
FR2375562A1 (en) Cupola furnace fitted with dust extn. plant - in which dust is returned to the cupola via an air injection pipe
ES8400252A1 (en) Process and apparatus for the thermal treatment of pulverized raw material.
JPS567914A (en) Incinerator
JPS5659122A (en) Melting treatment of incinerated ash of refuse
JPS57101217A (en) Combustion apparatus for refuse
CA2239391A1 (en) A system for preheating fuel
JPS56108820A (en) Heat treating furnace
DE3574906D1 (en) A shaft furnace for the prevention of used lead from accumulator scrap with a post-combustion system for the blast furnace gas generated during the prevention process.
JPS54119775A (en) Method and apparatus for feeding ep ash to incinerator

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed